Rohde & Schwarz Hameg Instruments HM7042-5 Manuel page 26

O p e r a t i n g c o n t r o l s a n d d i s p l a y s
off immediately if the mode "electronic fuse" was selected. In
"current limit" mode the LED
drop to zero.
ELECTRONIC FUSE
This pushbutton will activate the electronic fuse mode, indicated
by LED [ON].
Current limiting
After turn-on of the power supply it will always start in the
"Current limit" mode.
Using the CURRENT controls the maximum output cur-
rent I can be set for each output separately. Onset of current
max
limiting in one channel will not infl uence the others.
In order to adjust I the appropriate output has to be short-
max
circuited fi rst, then I can be set, the associated LED
max
will light up and indicate the current limit mode.
Electronic fuse (Fuse)
Prior to selection of this mode the current limits have to be set
using the CURRENT
has to be short-circuited fi rst before adjusting the appropriate
CURRENT control. After setting I
ved. Then Electronic Fuse
light up indicating that the HM7042-5 is in the Electronic Fuse
mode. In this mode all outputs will be immediately deactivated
if the I of one channel is reached. In order to leave this mode
max
press Electronic Fuse again.
The current limits can be set using the controls
CURRENT 0 – 2 A / 0 – 5 A. If a control is
set CCW to 0 A indeed the current will be zero, so
the output capacitances will be discharged slowly
to 0 V. In "Current Limit" mode the CCW position of
STOP
a control will cause the associated LED
light up, the output voltage will decrease slowly. In
the "Electronic Fuse" mode the CCW position of any
CURRENT control will result in immediate swit-
ching off of all channels after depressing OUPUT
OUTPUT
Pushbutton for turning all 3 channels simultaneously ON/OFF,
indicated by the LED [ON]. The voltage displays will remain
unaffected.
Mains switch
24
Subject to change without notice
will light up, the voltage will
controls. As outlined each output
, the short has to be remo-
max
is depressed, the LED [ON] will
or
to
.